Round Fiberglass Forms for Mortar Joints - Formcrete Fiberglass Products

Round Fiberglass Forms for Mortar Joints
Standard Premium Straight Wall/Flat Wall Structures

For holes NOT intended for field installed rubber connectors.
Both through holes and partial indentation knock out forms available
Partial hole/ knockouts must be ordered with attachment so they can be held tight to jacket wall.
Hole form diameters do not represent specific inside pipe diameter application.
Super durable built at 5/16” laminate thickness with a concrete resistant glossy white polyester gel coat.
We can create a custom sized mold that is not currently listed in this table.

Responsive Table

Wall Thickness Hole Form Face Dia. (Inner toward core)	6 Inch Wall		8 Inch Wall		12 Inch Wall
	Part No.	Wall Taper (Degrees)	Part No.	Wall Taper (Degrees)	Part No.	Wall Taper (Degrees)
4"	46	10	48	10
5"	56	6
6"	66	5 or 15	68	5
8"	86	20	88	10
10"	106	10	108	10
12"	126	10	128	10
14"	146	10	148	10
15"	156	10	158	10
16"	166	10	168	10
18"	186	10	188	10	1812	10
20"	206	10	208	10	2012	10
22"	226	10	228	10	2212	10
24"	246	5 or 15	248	10	2412	10
26"	266	10	268	10	2612	5 or 10
27"	276	5	278	5	2712
28"	286	10	288	10	2812	10
30"	306	10	308	10	3012	5
32"	326	10	328	10	3212	10
34"	346	10	348	10	3412	10
36"	366	10	368	10	3612	10
38"	386	20	388	20	3812	10
40"	406	18	408	18
41"	416	18	418	18
42"	426	10	428	10	4212	10
44"	446	14	448	14	4412	14
46"	466	14	468	14	4612	14
48"	486	10	488	10	4812	10
52"	526	6	528	6
55"	556	5	558	5
58"	586	5	588	5
60"	606	5	608	5
62"	626	10	628	10
65"	656	10	658	10
70"	706	10	708	10
78"	786	10	788	10

Revised: 6/19/25