EpoxAcast™ 690

EpoxAcast690x ⓘ AD75E949-FB82-734D-B4E6-0013F466C5FA
Epoxy

UV-resistant, clear epoxy casting resin with low viscosity for easy mixing and minimal bubble entrapment.

  • Shore Hardness: 80 D
  • Mix Ratio: 100A:30B by weight
  • Pot Life: 5 hours
  • Cure Time: 24 hours
  • Maximum casting thickness: 0.95 cm (3/8 in.)
exclamation.svg corrosion.svg

Warning

H315 - Causes skin irritation.
H317 - May cause an allergic skin reaction.
H319 - Causes serious eye irritation.
H314 - Causes severe skin burns and eye damage.
H318 - Causes serious eye damage.
€ 206.05

(€ 170.29 without 21% VAT)

In stock

Description

UV-resistant, clear epoxy casting resin, suitable for industrial and art projects requiring a rigid, clear finish. It features low viscosity for easy mixing and minimal bubble entrapment. Castings cure with negligible shrinkage and are hard and strong. The resin can be colored with specific colorants, and powders can be added for casting effects.

EpoxAcast™ 690 has moderate heat resistance, with a heat deflection temperature of about 46 °C (115 °F), making it best suited for room-temperature or low-heat applications. It combines long working time, clarity, and mechanical strength, making it an ideal choice for clear epoxy castings where appearance and precision are as important as durability.

Features

  • Standard Casting: Maximum thickness of 0.95 cm (3/8 in.) at 21°C (70°F).
  • Fan-Cooled Casting: Maximum thickness of 1.9 cm (3/4 in.) with air circulation at 21°C (70°F).
  • Suitable for creating epoxy resin tables.

Technical Properties

  • Mix Ratio By Weight: 100A:30B
  • Pot Life: 5 hours
  • Cure Time: 24 hours
  • Shore Hardness: 80 D
  • Specific Gravity: 1.10 g/cc
  • Specific Volume: 0.91 cm³/g (25 cu. in./lb.)
  • Color: Clear
  • Tensile Strength: 45.7 MPa (6,630 psi)
  • Tensile Modulus: 3,944 MPa (572,000 psi)
  • Tensile Elongation: 1.8%
  • Flexural Strength: 75.7 MPa (10,980 psi)
  • Flexural Modulus: 2,827 MPa (410,000 psi)
  • Compressive Strength: 66.3 MPa (9,610 psi)
  • Compressive Modulus: 630 MPa (91,300 psi)
  • Heat Deflection Temp: 46°C (115°F)
  • Index of Refraction at 20°C: 1.565
  • Shrinkage: 0.002 mm/mm
  • Mixed Viscosity: 280 mPa·s

Instructions

Preparation

  • Avoid breathing fumes; use in a well-ventilated area. A NIOSH approved respirator is recommended.
  • Wear safety glasses, long sleeves, and rubber gloves to minimize skin contact.
  • Store and use materials at room temperature (21°C/70°F). Elevated temperatures reduce Pot Life.
  • Properly measure and thoroughly mix components to achieve full cure properties.
  • Use containers with straight sides and flat bottoms. Mixing sticks should be flat and stiff.
  • Conduct a small test application to determine suitability for your project.

Applying A Release Agent

  • Use a release agent for non-porous surfaces to prevent adhesion.
  • Brush the release agent over all surfaces, follow with a light mist, and let dry for 30 minutes.

Temperature Is Important

  • Recommended ambient temperature is 21°C (70°F). For large mass pours, cooler environments are recommended.

Measuring / Dispensing

  • Stir Part A thoroughly before dispensing.
  • Use a digital gram scale to weigh Parts A and B accurately. Do not measure by volume.

Mixing

  • Ensure utensils are clean and free of contaminants.
  • Mix in a well-ventilated area.
  • Wear safety glasses, long sleeves, and rubber gloves.
  • Combine resin with hardener and mix for 3 minutes, scraping the container's sides and bottom.
  • Pour into a new container and mix again.
  • Do not delay between mixing and pouring. Do not vacuum the mixture.

Recommended Batch Size

  • Mix a maximum of 9.43 kg (20.8 lbs.) per pour. Increasing batch size may cause high exotherm.

Adding Color

  • Color with specific colorants or fillers. Pre-mix with Part A before adding Part B.
  • Run a small scale color test to ensure suitability.

Pouring

  • Ensure the area is clean, dry, and free of dust and insects.
  • Allow previous layers to cure fully before pouring subsequent layers.

Creating Epoxy Resin Tables

  • Can be poured in thick layers for applications like “river tables”.

Cure Time

  • Standard casting method at 21°C (70°F) cures in 24 hours for 0.95 cm (3/8 in.) thickness.
  • Fan-cooled casting method results in longer cure times.
  • Pot Life and Cure Time depend on mass and mold configuration.

After Curing

  • Epoxy can be sanded. Wear a mask to prevent inhalation of particles.
  • Cured epoxy is hard, durable, and resists moisture, moderate heat, and solvents.
  • Do not rest hot items above 49°C (120°F) on cured epoxy.
  • For outdoor display, paint with an aliphatic urethane clear coat to prevent yellowing.

Removing Epoxy

  • Scrape uncured epoxy from surfaces. Clean residue with specific cleaners or solvents.
  • Follow safety warnings for solvents and ensure adequate ventilation.

Specifications

Color Clear
Mixed Viscocity 280 cps
Cure Time 24 hours
Flexural Strength 10,980 psi
Pot Life 5 hours
Flexural Modulus 410,000 psi
Specific Volume 25 cu. in./lb.
Specific Gravity 1.10 g/cc
Mix Ratio By Weight 100A:30B
Shrinkage 0.002 in. / in.
Tensile Strength 6,630 psi
Shore D Hardness 80
Heat Deflection Temp 115 °F
Compressive Strength 9,610 psi
Tensile Elongation 1.8 %
Tensile Modulus 572,000 psi
Compressive Modulus 91,300 psi
Refractive Index 1.565 nm
Available in Epoxy
Product Color Flexural Strength Flexural Modulus Specific Volume Specific Gravity Shrinkage Dielectric Strength Heat Deflection Temperature Volume Resistivity Compressive Strength Volume Resistance Tensile Elongation Tensile Modulus Compressive Modulus Mixed Viscosity Mixed Viscosity With HT Hardener Barcol Hardness Ultimate Tensile Strength Ultimate Tensile Strength With HT Hardener Tensile Modulus With HT Hardener Tensile Elongation With HT Hardener Flexural Strength With HT Hardener Flexural Modulus With HT Hardener Compressive Strength With HT Hardener Compressive Modulus With HT Hardener Shrinkage With HT Hardener Heat Deflection Temperature With HT Hardener Dielectric Constant At 60 Hz Dielectric Constant At 1 KHz Color With HT Hardener Storage Temperature Shore D Hardness Thermal Conductivity Maximum Casting Volume Maximum Heat Resistance Mixed Viscosity (101, 102, 103 Hardener) Mixed Viscosity (HT Hardener) Specific Gravity (101, 102, 103 Hardener) Specific Gravity (HT Hardener) Specific Volume (101, 102, 103 Hardener) Specific Volume (HT Hardener) Ultimate Tensile Strength (101, 102, 103 Hardener) Ultimate Tensile Strength (HT Hardener) Tensile Modulus (101, 102, 103 Hardener) Tensile Modulus (HT Hardener) Tensile Elongation (101, 102, 103 Hardener) Tensile Elongation (HT Hardener) Compressive Strength (101, 102, 103 Hardener) Compressive Strength (HT Hardener) Compressive Modulus (101, 102, 103 Hardener) Compressive Modulus (HT Hardener) Shrinkage (101, 102, 103 Hardener) Shrinkage (HT Hardener) Heat Deflection Temperature (Room Temperature Cure) Heat Deflection Temperature (Post Cured) Cure Time Specific Gravity Specific Volume Tensile Strength Tensile Modulus Compressive Strength Compressive Modulus Flexural Strength Shrinkage Heat Deflection Temp Tensile Elongation Flexural Modulus Mixed Viscocity Mix Ratio By Weight Pot Life Shore D Hardness Mixed Viscocity Cure Time Pot Life Mix Ratio By Weight Tensile Strength Heat Deflection Temp Refractive Index Refractive Index Ultimate Tensile Ultimate Tensile
EpoxAcast™ 650 Off-White 5,890 PSI 710,000 PSI 18.22 cu. in./lb 1.52 g/cc 0.001 in/in 404 V/mil 129°F / 54°C >3.59E+15 ohm cm 16,350 PSI >5.42E+11 ohm 0.42% 1,503,000 PSI 142,600 PSI 7,000 CPS 5,000 CPS 93.000000 6,000 PSI 6,900 PSI 1,079,000 PSI 0.82% 10,850 PSI 775,000 PSI 15,980 PSI 134,400 PSI 0.007 in/in 187°F / 86°C 5.300000 5.080000 Black - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
EpoxAcast™ 655 Grey 7,660 psi 1,403,000 psi - - - - - - - - - - - - - - - - - - - - - - - - - - - 73°F/23°C 90 0.675 W/(m*K) 8,390 cm³ 225°F/108°C 23,000 cps 12,000 cps 1.66 g/cc 1.64 g/cc 16.7 cu. in./lb 16.5 cu. in./lb 4810 psi 6,000 psi 2,040,000 psi 7,200,000 psi 0.54% 0.50% 12,500 psi 15,700 psi 125,500 psi 270,000 psi 0.0006 in./in. 0.001 in./in. 135°F/57°C 225°F/108°C - - - - - - - - - - - - - - - - - - - - - - - - - -
EpoxAcast™ 670 HT Beige 11,000 psi 254,000 psi 20.51 cu. in./lb. 1.15 g/cc 0.002 in. / in. - - - 13,000 psi - 0.65 % 332,000 psi 101,400 psi - - - - - - - - - - - - - - - - - 90 - - - - - - - - - - - - - - - - - - - - - - - <p>Twenty Four Hours Followed By Post Cure</p > 1.15 g/cc 20.51 cu. in./lb. 4,500 psi 332,000 psi 13,000 psi 101,400 psi 11,000 psi 0.002 in. / in. 350 °F 0.65 % 254,000 psi 6,000 cps 100A:16B 3 h. 90 6,000 cps <p>Twenty Four Hours Followed By Post Cure</p > 3 h. 100A:16B 4,500 psi 350 °F - - - -
EpoxAcast™ 690 Clear 10,980 psi 410,000 psi 25 cu. in./lb. 1.10 g/cc 0.002 in. / in. - - - 9,610 psi - 1.8 % 572,000 psi 91,300 psi - - - - - - - - - - - - - - - - - 80 - - - - - - - - - - - - - - - - - - - - - - - 24 h. 1.10 g/cc 25 cu. in./lb. 6,630 psi 572,000 psi 9,610 psi 91,300 psi 10,980 psi 0.002 in. / in. 115 °F 1.8 % 410,000 psi 280 cps 100A:30B 5 h. 80 280 cps 24 h. 5 h. 100A:30B 6,630 psi 115 °F 1.565 nm 1.565 nm - -
EpoxAcast™ 692 Deep Pour Clear 6,780 psi 203,000 psi 25.7 cu. in./lb. 1.08 g/cc 0.007 in. / in. - - - 5,777 psi - 3.1 % 378,000 psi 82,000 psi - - - - - - - - - - - - - - - - - 80 - - - - - - - - - - - - - - - - - - - - - - - - 1.08 g/cc 25.7 cu. in./lb. - 378,000 psi 5,777 psi 82,000 psi 6,780 psi 0.007 in. / in. 100 °F 3.1 % 203,000 psi 370 cps 100A:40B 12 h. 80 370 cps - 12 h. 100A:40B - 100 °F 1.5372 nm 1.5372 nm 4,585 psi 4,585 psi
EpoxAcast™ Hardener - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Why buy at FormX?

Subscribe to our Newsletter

Receive €5,- discount on your first purchase!

Visa logo iDeal logo Mastercard logo Paypal logo FedEx logo FedEx logo
This website has been developed by Usecue B.V.
© 2026 FormX B.V.