URE-FIL Fillers

Fillers For Resins and Rubbers

URE-FIL® fillers disperse easily in Smooth-On materials. They can be added to materials in different proportions to achieve a variety of working properties and effects. Some fillers are designed for cost-savings, others are designed for specific casting effects or improved physical properties. Other URE-FIL® fillers are designed specifically for thickening materials for brush-on or trowelable application.

Price and Purchasing

Call to Order

Subtotal:
ProductSizeNet WeightPrice
Quantity

URE-FIL 3

Ceramic based filler for urethane resins.
WARNING: Prop 65 Notice
WARNING: Known to the state of CA to cause cancer, birth defects or reproductive harm - www.P65Warnings.ca.gov
 Gallon Unit 3 lbs. 2793
5 Gallon Unit 15 lbs. 10470

URE-FIL 5

Filler for urethane resins - excellent for woodgrain effects. 		Gallon Unit 3 lbs. 1716
5 Gallon Unit 15 lbs. 6019

URE-FIL 7

Filler for urethane resins - provides dimensional stability. 		Gallon Unit 10 lbs. 5920
5 Gallon Unit 50 lbs. 25047

URE-FIL 9

Fumed Silica for Thickening Liquid Rubber & Liquid Plastic - Avoid getting airborne or inhaling. READ MSDS BEFORE USING. 		Gallon Unit 0.66 lb. 1990
5 Gallon Unit 10 lbs. 19631

URE-FIL 11

Extruded short fibers for thickening urethane and silicone rubbers, urethane plastics and epoxies. 		Gallon Unit 1 lb. 3406
5 Gallon Unit 7 lbs. 18894

URE-FIL 13

Poly-blend filler used to thicken urethane plastics and epoxies for vertical surface application. 		Gallon Unit 1 lb. 2823
5 Gallon Unit 7 lbs. 13932

URE-FIL 15

micro-balloons that can be added to Smooth-On urethane plastics and epoxies to create very lightweight castings. 		Gallon Unit 0.7 lb. 2035
5 Gallon Unit 3.5 lbs. 7293

URE-FIL 17

Pure aluminum pellet filler to improve thermal conductivity, dimensional stability, reduce shrinkage in large mass castings, etc. (400 micron) 		4 lb 4 lbs. 7810
10 lb 10 lbs. 15550
25 lb 25 lbs. 32549

URE-FIL 19

Pure aluminum pellet filler to improve thermal conductivity, dimensional stability, reduce shrinkage in large mass castings, etc. (1200 micron) 		4 lb 4 lbs. 7810
10 lb 10 lbs. 15382
25 lb 25 lbs. 32191

Document Downloads

Technical Bulletins

Safety Data Sheets

Videos

URE-FIL Fillers Video:

Creating Realistic Wood Replications Using Smooth-Cast™ 320 Resin and URE-FIL™ 5

 URE-FIL Fillers Video:

How To Add Weight To Cold Cast Metal Castings Using URE-FIL™ 17

 URE-FIL Fillers Video:

How To Make Resin Jewelry Using URE-FIL™ 19

How-To Galleries

URE-FIL Fillers Gallery:

How to Make a Glove Mold with Dragon Skin & Cast a Faux Wood Repro

 URE-FIL Fillers Gallery:

Achieving A Woodgrain Finish using Smooth-Cast® Resin

 URE-FIL Fillers Gallery:

Create Your Own Cast Live Rock Using Smooth-Cast 321

 URE-FIL Fillers Gallery:

Making a One Piece Cut Seam Mold of a Head Using Body Double

Images

URE-FIL Fillers Image:
© 2025

URE-FIL® 9 used to thicken Brush-On® urethane rubber to fill undercuts and create cut shims on mold.

URE-FIL Fillers Image:
© 2025

Piece of driftwood is molded and cast with Smooth-Cast® 325 plastic using URE-FIL® 5 to achieve a wood effect.

URE-FIL Fillers Image:
© 2025

Smooth-Cast® 325 casting with URE-FIL® 5 reproduces fine wood texture.

URE-FIL Fillers Image:
© 2025

Marble effect using URE-FIL® 7 and SO-Strong® tints in Smooth-Cast® 325 urethane plastic.

URE-FIL Fillers Image:
© 2025

Original wood carving next to Smooth-Cast® 325 casting with URE-FIL® 5

 

Related Products

  • Epsilon PRO

    Protective, impact resistant coating for EPS, polyurethane foam, and more.

  • Plasti-Paste

    Trowelable urethane plastic support shell and fabrication material

  • Smooth-Cast ONYX Series

    1A:1B by volume, low viscosity urethane resin that cure at room temperature to a deep black, solid plastic

  • Smooth-Cast 300 Series

    Ultra low viscosity, 1:1 mix ratio white liquid casting resins

  • Smooth-Cast 320 Series

    Ultra low viscosity, 1:1 mix ratio off-white casting resins

  • Smooth-Cast 325 Series

    Colormatch® resins developed specifically for the addition of colorants

  • Smooth-Cast Semi-Rigid Series

    Low-cost, 1A:1B by volume semi-rigid urethane casting resins that offer excellent impact resistance

  • TASK 7

    Flame rated, low viscosity, fast set casting resin that meets UL 94 V-O requirements for flame resistance

  • TASK 11

    Semi-rigid resin which is suitable for dry food applications

  • TASK 15

    Urethane resin with high impact resistance developed for machine rotocasting

  • TASK 16

    Fast-setting Shore 80A/30D rubber that offers very high tear strength, impact resistance and wear resistance

  • TASK 2 & 3

    Low viscosity, high performance white casting resins

  • TASK 21

    Performance urethane casting resin with high ABS-type compressive and flexural strength

  • TASK 4

    Polyurethane casting resin that is very strong when cast in ultra-thin sections

  • TASK 5 & 6

    Low cost, high performance tan casting resins

  • TASK 8

    Heat resistant polyurethane resin system which withstands up to 263°F /129°C

  • TASK 9

    High performance clear amber urethane casting resin that features very high compressive and tensile strength

Our Edmonton Reynolds Advanced Materials branch will permanently close June 11th. We’re grateful for your support during our time in Canada and look forward to continuing to serve you through
other Canadian distributors.