FLEXTRIM #RB3: Flexible Casing Molding: 1-1/16" Thick x 3.5" Wide x 12 feet Long - for Gentle Arches, Curved Walls and Straight Runs (NOT for Half-Round Shaped Arches)








Key features
- •Item #RB3: 1-1/16" thick and 3-1/2" wide - 12 feet long - flexible casing molding
- •MADE IN THE USA! WATERPROOF - DURABLE - FLEXIBLE - FOR INTERIOR AND EXTERIOR USE
- •This item comes as a straight yet flexible piece. Can be installed with normal woodworking tools, if a tighter curve is needed please rip the profile in half and re-assemble into an arch shape.
- •Material is flexible polyurethane resin - only recommended for painting applications but can be stained with a gel based stain
- •See product images for installation instructions.
BrandFLEXTRIM
CategoryDoor Molding & Trim
Size1-1/16" thick x 3.5" wide x 144" (12 feet long)
Colorlight tan
FLEXTRIM #RB3: Flexible Casing Molding: 1-1/16" Thick x 3.5" Wide x 12 feet Long - for Gentle Arches, Curved Walls and Straight Runs (NOT for Half-Round Shaped Arches)
List Price: $216.80$195.12DEALYou Save: $21.68 (10%)
Free shippingFree Returns – 30 daysFree Order CancellationSecure Payment2–3 Days DeliveryGet It June 25, 2026In Stock (1)No marketing spamNo account requiredFulfilment by FedEx / Amazon / UPS / ShipwirePayPal / Card Buyer Protection
Customer Reviews
Reviews sourced from verified Amazon purchasers4.3
out of 5
Based on 3 reviews
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Was the answer for us
MyFriendTait✓ Verified Purchase•October 16, 2023
We had hired a contractor to do some home renovations and ended up having to fire him and finish some of the work ourselves. The biggest issue we had was an arched doorway that was built into the existing doorway where a sliding glass door had been removed. The contractor managed to finish the plaster side of the arch very well, but had no idea how to finish the opposite side where we had installed Shiplap. He clearly didn't know what he was doing and had used a ton of wood filler for some reason.
After having fired the contractor, we started looking for ways to finish the arch ourselves. YouTube to the rescue! I watched a woman install this flexible molding to the top of an arched doorway. She did it herself and it looked great once finished. We ordered it, installed it, painted it white and it looks great!
After having fired the contractor, we started looking for ways to finish the arch ourselves. YouTube to the rescue! I watched a woman install this flexible molding to the top of an arched doorway. She did it herself and it looked great once finished. We ordered it, installed it, painted it white and it looks great!
Used on a curved window.
Vlad F.✓ Verified Purchase•June 20, 2023
A bit pricy but still like it.
My carpenter loved it
volleygirl11✓ Verified Purchase•May 29, 2023
We needed to do trim around a doorway and needed it to bend . The wood pieces were not working . Looks just as nice ! ( just used on the top part)







